Ken Follett's The Pillars of the Earth and World Without End are two of my all-time favorite books. Last year, I fell in love with The Pillars of the Earth miniseries and was beyond thrilled when I heard that World Without End was also being made into a miniseries. World Without End was my favorite book between the two: I loved the love story and the inclusion of the black plague.
My husband is also a Follett fan and we watched this series together. I really enjoyed the World Without End miniseries, and I'm really glad I watched it, but I thought that The Pillars of the Earth miniseries was better. World Without End strayed too far from the book (why they felt the need to change an already-perfect plot is beyond me) and I did not always agree with the changes that were made. So much death! Sex! Back-stabbing!
I still highly recommend the World Without End miniseries, as it's a great story acted out by an oustanding cast with great acting. Bottom line: World Without End is my favorite Follett book but The Pillars of the Earth had a better screen adaptation.